On Tue, 14 Mar 2023 at 23:21, Bart Van Assche <bvanassche@xxxxxxx> wrote: > > On 3/14/23 16:00, Alexey Klimov wrote: > > The delay is found to be in device's ->shutdown() methods called from kernel_restart(): > > void kernel_restart_prepare(char *cmd) > > { > > blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd); > > system_state = SYSTEM_RESTART; > > usermodehelper_disable(); > > device_shutdown(); <---- here [..] > > Please let me know if you want me to resubmit patch "scsi: ufs: Remove > the LUN quiescing code from ufshcd_wl_shutdown()" > (https://lore.kernel.org/linux-scsi/20220331223424.1054715-14-bvanassche@xxxxxxx/). This indeed works and helps to reduce reboot time. Thanks! If you decide to resubmit, feel free to ping me to test it. However I have no knowledge how comments from Adrian can be addressed. With that patch the reboot time decreases from 60-100 seconds to ~10-20 seconds. The next "slow" thing is wlan driver which callback is called from blocking_notifier_call_chain(&reboot_notifier_list, ...) but obviously it is not a part of ufs code. Best regards, Alexey